Anaheim, CA (SportsNetwork.com) - Garrett Richards limited Oakland to one run during seven stellar innings and Mike Trout drove in a pair of runs as the Los Angeles Angels opened a three-game set with the Athletics with a 4-1 win.

Richards (6-2) allowed just four hits and didn't walk a batter in his second consecutive win following the shortest outing of his career. After giving up five runs in two-thirds of an inning against Oakland on May 30, Richards has recorded back-to-back wins, allowing a run and eight hits combined over 15 innings of work.

Trout appeared to have hit his 13th home run of the season in the fifth inning, but umpires determined after a lengthy video review that his ball was interfered with by a fan prior to exiting the ballpark. Trout had to settle for an RBI double, while Angels manager Mike Scioscia was ejected for arguing the ruling.

"That ball was over the yellow line when it hit that glove," Scioscia said, alluding to the glove of the fan who interfered with the ball. "There was no doubt. ... There is no way that that ball was not a home run. No way. So yeah, I was frustrated."

Hank Conger went 2-for-3 with two runs scored and an RBI, and Raul Ibanez drove in the other run for the Angels, winners in a season-high four straight.

Jesse Chavez (5-4) was charged with three runs -- two earned -- on eight hits over six innings to absorb the loss.

"We didn't play a clean game tonight and we didn't swing the bats well," said A's manager Bob Melvin. "Chavez pitched well. We just didn't get anything going."

The A's broke through first with a run in the second inning. Yoenis Cespedes roped his 17th double of the season into left and scored on Stephen Vogt's base knock for an early 1-0 lead.

Vogt and Cespedes each had two hits to account for Oakland's four.

Trout stepped up in the third inning with runners on the corners and drove a ball to center that, like his drive in the fifth, nearly left the ballpark. A's centerfielder Coco Crisp tracked it down and made a leaping catch at the warning track. Conger scored to tie the game.

Ibanez delivered the eventual game-winning single in the fourth before getting thrown out trying to steal to end the inning. David Freese led off with a walk and moved into scoring position when Howie Kendrick was hit by a pitch.

Trout was awarded a ground-rule double in the fifth, scoring Conger for a 3-1 margin.

Conger then padded LA's cushion in the eighth, sending Kendrick home with a single to right. Kendrick opened the stanza reaching first on Josh Donaldson's error throwing to first.

Ernesto Frieri struck out the side in the ninth inning to secure his 11th save.

Game Notes

The Angels had 17 baserunners compared to five for Oakland ... LA finished 4- for-16 with runners in scoring position and left 10 men on base.